Script for detect attribute value you can custome with callback function inside on mutation observer

attribute value detect.js

 $(document).ready(function(){
  let list = document.querySelectorAll('.card-header');
  let MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver
  let observer = new MutationObserver(function(mutations) {
    let mutation = mutations[0]
    let element = $(mutation.target)
    if (element.attr('aria-expanded') === 'true'){
      element.removeClass('bg-white').css('background-color', '#f58508')
    }else{
      element.addClass('bg-white')
    }
  })
  list.forEach(function(node){
    observer.observe(node, {
      attributes: true,
      childList: true,
      characterData: true
  })
  })
})